// instance.java -- test the `instanceof' operator. import java.util.EventListener; public class instance implements EventListener { public static void main (String[] args) { Object x1 = new instance (); EventListener x2 = new instance (); IllegalArgumentException iae = new IllegalArgumentException ("any random class"); String x3 = "zardoz"; Object x4 = "zardoz"; // Test simple object stuff System.out.println (x1 instanceof Object); System.out.println (x1 instanceof IllegalArgumentException); System.out.println (x1 instanceof EventListener); System.out.println (x1 instanceof String); System.out.println ("="); // Test with value which is an interface. System.out.println (x2 instanceof Object); System.out.println (x2 instanceof IllegalArgumentException); System.out.println (x2 instanceof EventListener); System.out.println ("="); // Test with value which is a final class. System.out.println (x3 instanceof Object); System.out.println (x3 instanceof String); System.out.println ("="); // Test with value which is a random class. System.out.println (iae instanceof Object); System.out.println (iae instanceof IllegalArgumentException); System.out.println (iae instanceof EventListener); System.out.println ("="); // Test with value which is a final class, but not known // statically. System.out.println (x4 instanceof Object); System.out.println (x4 instanceof IllegalArgumentException); System.out.println (x4 instanceof EventListener); System.out.println (x4 instanceof String); System.out.println (x4 instanceof int[]); } }
